Diseases and Conditions > Influenza (Flu) > PA Influenza Weekly Report

2014/15 Influenza Season

The Pennsylvania Department of Health (PADOH) monitors influenza activity throughout the year, but ramps up surveillance activities in the fall and winter. The official influenza surveillance season starts with the 40th week of the year (typically around the beginning of October) and ends on the 20th week of the following year (in May). For the 2014/15 season, the influenza surveillance season began on September 28, 2014 and will run through May 23, 2015.  Updated influenza activity data will be posted on this web page every Tuesday throughout the influenza surveillance season.  These updates will provide a summary on:

 

1. When and where influenza activity is occurring; and

 

2. Current trends in influenza as compared to previous seasons; and

 

3. What types and subtypes of influenza viruses are currently circulating;              

 

It is important to note that the influenza case counts presented on this page are restricted to only those cases who have had a positive laboratory test for flu (by rapid test, DFA, PCR or culture) reported to the PA DOH.  These case counts represent only a fraction of the actual burden of illness due to influenza occurring in the commonwealth at any given time. This is because most persons with influenza do not go to the doctor or are not tested or reported.  Influenza spread and severity varies widely from season to season.  It is estimated that 5 to 20% (600,000 to 2,400,000) of Pennsylvanians get the flu each year and 120 to 2,000 die from complications of influenza.

 

 

 Flu Activity Code: SPORADIC (week 43 ending October 25, 2014  )

*The flu code is a characterization of the geographic spread of influenza in Pennsylvania. It does not tell how bad one season compares to another. Rather, it shows the level of influenza activity in Pennsylvania counties. The level of activity is classified based on CDC definitions below, which are used by all 50 states to characterize influenza activity*

No Activity

No laboratory-confirmed cases of influenza and no reported increase in the number of cases of ILI.

Sporadic

Small numbers of laboratory-confirmed influenza cases or a single laboratory-confirmed influenza outbreak has been reported, but there is no increase in cases of ILI.

Local

Outbreaks of influenza or increases in ILI cases and recent laboratory-confirmed influenza in a single region of the state.

Regional

Outbreaks of influenza or increases in ILI and recent laboratory confirmed influenza in at least two but less than half the regions of the state with recent laboratory evidence of influenza in those regions.

Widespread

Outbreaks of influenza or increases in ILI cases and recent laboratory-confirmed influenza in at least half the regions of the state with recent laboratory evidence of influenza in the state.

 

Influenza surveillance weeks run from week 40 (which ended October 4, 2014) through week 52 (at the end of 2014) and up from week 1 (in January of 2015) to week 39 (late September of 2015). The data presented below reflect influenza activity during each of the surveillance weeks referred to above and may change from week to week as numbers are adjusted for late reporting, misclassification of cases and errors in classifying county or state of residence.

Table 1. Influenza cases (positive by rapid test, PCR or culture) Reported in Pennsylvania, 9/28/14 to 10/25/14 (n=142)  - Cases by County and Influenza Type 

 

County

Influenza Type

TOTAL

A

B

U

ADAMS 

1

.

.

1

ALLEGHENY 

4

1

.

5

BEDFORD 

.

1

.

1

BERKS 

2

3

.

5

BLAIR 

.

2

1

3

BUCKS 

2

.

.

2

BUTLER 

1

5

.

6

CHESTER 

2

.

1

3

CLARION 

1

1

.

2

COLUMBIA 

3

.

.

3

CRAWFORD 

18

.

1

19

CUMBERLAND 

3

.

.

3

DAUPHIN 

1

.

.

1

DELAWARE 

7

1

.

8

ELK 

.

1

.

1

ERIE 

2

.

.

2

FAYETTE 

5

2

.

7

FOREST 

1

.

.

1

FRANKLIN 

1

.

.

1

GREENE 

1

.

.

1

JEFFERSON 

.

1

.

1

LACKAWANNA 

3

2

.

5

LANCASTER 

3

.

.

3

LEBANON 

.

1

.

1

LEHIGH 

4

.

.

4

LUZERNE 

1

6

.

7

LYCOMING 

.

1

.

1

MCKEAN 

1

.

.

1

MONTGOMERY 

6

.

.

6

MONTOUR 

.

1

.

1

NORTHAMPTON 

4

10

.

14

PHILADELPHIA 

5

2

.

7

POTTER 

.

1

.

1

SCHUYLKILL 

3

1

.

4

SOMERSET 

.

1

.

1

SUSQUEHANNA 

.

1

.

1

VENANGO 

.

1

.

1

WASHINGTON 

5

2

.

7

WESTMORELAND 

.

1

.

1

All

90

49

3

142

 

Figure 1. Number of PA Influenza Cases by week of first report

 

Figure 2: Comparison of PA-NEDSS Influenza Cases (All Types) in Current Season to the 7 Previous Seasons

 

 

Figure 3:  Season-to-date Influenza Sub-Typing Results From State Public Health Lab